Question

我正在使用Xcode 10和最新的react-native版本。我用StackNavigator创建了TabNavigator应用。

代码：navigation.js类

import React from "react";
import { TabNavigator, StyleSheet, Text, View, Image} from "react-navigation";

import Dashboard from '.././Screen/Dashboard'
import Home from '.././Screen/Home'
import Events from '.././Screen/Events'
import Settings from '.././Screen/Settings'


export default Tab = TabNavigator({
  Home: {
    screen: Home,
  },
  Settings: {
    screen: Settings,
    navigationOptions: {
          tabBarLabel: 'Settings',
          tabBarIcon: ({ tintColor }) => (
            <Image source={require('.././assets/setting.png')}
            style= {{width:15, height:15, tintColor:'black'}}>
            </Image>
        )
    },
  },
  Events: {
    screen: Events,
    },
  }, {
  tabBarPosition: 'bottom',
  swipeEnabled: true,
  tabBarOptions: {
    showIcon: true,
    activeTintColor: '#f2f2f2',
    activeBackgroundColor: "#2EC4B6",
    inactiveTintColor: '#666',
    labelStyle: {
      fontSize: 16,
      padding:4,
    }
  }
});

但是我在这里出错了，

[致命] [tid：com.facebook.react.ExceptionsManagerQueue]未处理的JS异常：不变违规：不变违规：不变违规：元素类型无效：预期为字符串（对于内置组件）或类/函数（对于复合组件），但得到：未定义。您可能忘记了从定义文件中导出组件，或者可能混淆了默认导入和命名导入。

检查TabBarIcon的呈现方法。

如果我删除此行：

tabBarIcon: ({ tintColor }) => (
                <Image source={require('.././assets/setting.jpeg')}
                style= {{width:15, height:15, tintColor:'black'}}>
                </Image>
            )

然后完美运行而无需图标。我搜索了所有内容，但找不到解决方法。

Answer 1

请尝试此操作（假设您正在创建底部导航器，并且您具有最新的反应导航）

import { createBottomTabNavigator } from 'react-navigation';

export default createBottomTabNavigator({
  Home: {
    screen: Home,
  },
  Settings: {
    screen: Settings,
    navigationOptions: {
          tabBarLabel: 'Settings',
          tabBarIcon: ({ tintColor }) => (
            <Image source={require('.././assets/setting.png')}
            style= {{width:15, height:15, tintColor:'black'}}>
            </Image>
        )
    },
  },
  Events: {
    screen: Events,
    },
  }, {
  tabBarPosition: 'bottom',
  swipeEnabled: true,
  tabBarOptions: {
    showIcon: true,
    activeTintColor: '#f2f2f2',
    activeBackgroundColor: "#2EC4B6",
    inactiveTintColor: '#666',
    labelStyle: {
      fontSize: 16,
      padding:4,
    }
  }
});

TabNavigator自定义图标错误在本机

1 个答案: